<template>
  <div class="list" ref="wrapper">
      <div>
      <div class="area">
          <div class="title border-topbottom">当前城市</div>
          <div class="button-list">
              <div class="button-wrapper">
              <div class="button">{{this.currentCity}}</div>
              </div>
          </div>
      </div>
      <div class="area">
          <div class="title border-topbottom">热门城市</div>
          <div class="button-list">
             <div
            class="button-wrapper"
            v-for="item of hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
          </div>
          
      </div>
      <div class="area" 
           v-for="(item, key) of cities" 
           :key="key"
           :ref="key"
           >
          <div class="title border-topbottom">{{key}}</div>
          <div class="item-list">
              <div 
              class="item border-bottom"
              v-for="innerItem of item"
              :key="innerItem.id"
               @click="handleCityClick(innerItem.name)"
              >
              {{innerItem.name}}</div>
          </div>
          </div>
      </div>
  </div>
</template>

<script>
import {mapState,mapMutations} from 'vuex'
import BScroll from 'better-scroll'
export default {
  name: "CityList",
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed:{
      ...mapState({
          currentCity:'city'
      })
  },
  methods:{
      handleCityClick(city){
          this.$store.commit('changeCity',city)
          this.changeCity(city)
          this.$router.push('/')
      },
      ...mapMutations(['changeCity'])
  },
  mounted () {
      this.scroll = new BScroll(this.$refs.wrapper)
  },
  watch:{
    letter () {
      if(this.letter){
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
};
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl';
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
.list{
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
}
.title{
    line-height :.54rem
    background :#eee
    padding-left :.2rem
    color :#666
}
.button-list{
    overflow :hidden
    padding: .1rem .6rem .1rem .1rem
}
.button-wrapper{
    float :left
    width :33.33%
}
.button{
    margin :.1rem
    padding :.1rem 0
    text-align :center
    border :.02rem solid #ccc
    border-radius :.06rem
}
.item-list{
    line-height :.54rem
    padding-left :.2rem
}
</style>
